191092665147 has 8 divisors (see below), whose sum is σ = 254792274240. Its totient is φ = 127394083080.

The previous prime is 191092665131. The next prime is 191092665149. The reversal of 191092665147 is 741566290191.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 191092665147 - 2⁴ = 191092665131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 191092665147.

It is not an unprimeable number, because it can be changed into a prime (191092665149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476772 + ... + 780702.

It is an arithmetic number, because the mean of its divisors is an integer number (31849034280).

Almost surely, 2^191092665147 is an apocalyptic number.

191092665147 is a deficient number, since it is larger than the sum of its proper divisors (63699609093).

191092665147 is a wasteful number, since it uses less digits than its factorization.

191092665147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513513.

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 191092665147 in words is "one hundred ninety-one billion, ninety-two million, six hundred sixty-five thousand, one hundred forty-seven".